[builtins] Remove some (now) unused code from C++ builtin adaptor.

src/builtins.cc

Index: src/builtins.cc
diff --git a/src/builtins.cc b/src/builtins.cc
index d7824504cae7b1a5c4d780914732a8728997bf7d..22ad3fa22cd39da15cf5d045f6561c99d676cf54 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -1762,6 +1762,9 @@ BUILTIN(SymbolConstructor) {
 // ES6 section 19.4.1.1 Symbol ( [ description ] ) for the [[Construct]] case.
 BUILTIN(SymbolConstructor_ConstructStub) {
   HandleScope scope(isolate);
+  // The ConstructStub is executed in the context of the caller, so we need
+  // to enter the callee context first before raising an exception.
+  isolate->set_context(args.called_function()->context());
   THROW_NEW_ERROR_RETURN_FAILURE(
       isolate, NewTypeError(MessageTemplate::kNotConstructor,
                             isolate->factory()->Symbol_string()));